I was thinking it's fine with me and to do it I would rename an existing forum in Total Motorcycle Talk to it (as I had errors before creating/moving forums and don't want to chance it again). Any suggestions if you think this is a good idea?

I don't know how much traffic it will get. Of course, vintage bikes do have their own insane following from restoring to building, riding to racing. I used to customize and race the XZ550 until the ninja years caught up to it.